Shock-absorber.



F. SGHIMMEL. I SHOCK ABSO'RBER.

I APPLIGATIONIILED MAY 231912.

i Patented Feb. 4, 1918.

WITNESSES Y h Anon/vn UNITED sra'rns A`errrnivfr carica. Y

FBIIDOLIN SCHIMMEL, OF FARIBAULT. MINNESOTA, ASSIGNOR T0 SCHIMMEL, REID& (IOI'IIPANY,v OF FARIBAULT, MINNESOTA, A CORPORATION OF MINNESOTA.

SHOCK-ABSORBER.

T o all whom t may concern 'Be it known that I, FRIDO'LIN SGHDIMEL, acitizen of the United States, residing at Faribault, Rice'county, Stateof Minnesota` have invented certain new and useful linprovements inShock-Absorbers, of which the following is a specification, referencebeinghad therein to the accompanying drawing.

This invention relates to that class of shock absorbers in whichmechanism is arl rangedy to allow relatively movable bodies, asvehicle-body and vehicle axle, to move to ward or'away from each otherwith a'minimum shock or jar and has for its object the production of ashock absorber which will present a relatively increasing retardation inits' movement as the shock varies.

My shock absorber is of a type commonly' lmown as. the resistance toggletype in which one arm of the toggle is pivoted to the car frame, orother part of the car body, and the other arm to the axle, or similarpart, the joint being so constructed that the friction between therotating members is varied from a. predetermined intensity to acomparatively greater intensity, depending upon the-degree of rotation.

With these and other objects in view, the invention consists of certainnovel features .of construction, as will be more fully described andparticularly pointed out in the claim.

In the accompanying taie sheet of drawings, Figure 1 is a side elevationshowing the shock absorber connected in position between two relativelymovable members of an automobile, illustrated by broken lines. Fig. 2.is a section of the two-part arm of the toggle along the line 2 2 Fig.1.Fig. 3. is an elevation in part section showing the friction membersalong the line 3 3 Fig. l. Figs. land 5. show details of the conicalfriction member provided with the cam for regulating the pressurebetween the friction surfaces.

My shock absorber may be applied 'in various different ways between thespring `connected parts or members, but for the purpose of illustration,it is shown as pivotally connected between the upper and lower membersof an ordinary vehicle spring, being indicated by the broken lines inFig. 1.

My shock absorber comprises a friction hub 1, provided with an extensionarm 2, a

Speccation of Letters Patent.

Application filed May 23, 1912.

ratei-treu ret. 4,1913.

Serial No. 699,306.

conical recess 3 on one side of the hub, anda cam face 4 on the oppositeside, and a central hole 5. Adapted to pivotedly turn in the conicalrecess 3 l provide a conical member 6 having a projection 7 adapted toengage a slot 8 in the spring arm 9. The arm 9 is also provided withhole 10 which -is coaxial with hole 5 of the hub 1. On the end oppositethe hole l() is a similar hole 11 providing a means for pivotedlyconnecting this arm of the toggle to a body or the like. At this pointthe arm 9 is attachedfto another arm 12 by the bolt 13 and separator orwasher 14. On the opposite end of the arm 12 l provide two curved facesladapted to contact with and ride on the cam faces 4 before described. Ahousing 16 is providedl inclosing these moving parts, the whole beingassembled and held together by the stud 17 passing through holes 5.

The stud or bolt is provided with washer, nut and oil cap, as will bereadily understood by 'referring' to Figs. 2 and 3. A nutequipped bolt18 is passed through the intermediate portions of the spring arms 9 and12, preferably at a point close to the hub 1. The object of this bolt isto bring the spring arms together, thereby regulating in part thepressure between the conical friction' surfaces through a yieldingmember. The normal intensity of friction between the conical the conicalrecess 3 is a part of hub 1 attached to arm 2, and the conical member 6through its lug T engaging slot S of arm 9 is forced to move as a partof arms 9 and 12.

In a shock absorber of the above character, it is desirable to obtainincreased frictional resistance Whenever -the ytoggle arms are givenextreme movements by very intense shocks; and this is accomplished inthe following manner. Under ordinary circumstances the surfaces 15 ofthe arm 12 ride on the low spots of the cam face 4. As the degree ofrotation of the conical members is increased', due to opening or closingof the toggle arms attached to the vehicle spring the parts 15 ride upon thehigh spots of the com 4 thereby drmvingg the eonieni fric.- tionsurfaces together under the yieiding pressure, through the arms 9 und.Means is provided for oiling the'friction surfaces and keep the samefree from dirt.

The mechanism herein illustrated :ind described is in the form in whichI desire to construct it but any nioifiezitions may vbe made withoutdeparting from the saieiit 'features of my invention. and I thereforeintend the foUQwing claim to cover such modifications as natur-illy fullWithin the lines of invention.

I claim:

shock absorber comprising a pair of arms connected to act as a izopfgi@one of noname a circular cam; the other of mid arms being made up'of aipair of Internity spaced spring metal bars, one of said. bars providedwith n friction surface engaging; the before-nientioned :frictionsurface, the other bar adapted to ride on thi:j cam surface, whereby thefric4 tion surfaces are brought together with n variable Vieldingpressure This: speeieation signed und witnessed :1t tfnribant. Ricecounty. State of iinnesou. this 20th (hir of May, A. D. 1912.

FRLDULI SCHIMMEL. yin The presence o J. YV. Lr. Gnomz, 'HENRYSCHL-irren.

